Bolster.



J. F. STREIB.

oLsER.

APPLICATION FILED MAY I9, |914.

Patented Dec. 7, 191" eff-mf" s n. n

self: m

ULITED s'raTEs PATENT oEEioE.

JOHN F. STREIB, OF AVALON, PENNSYL-FANIA, ASSIGNOR T0 IPRIESSEIDh STEEL CAR COMPANY, 0F PITTSBURGH, VIENNSYLVANXA, A CORPORATION 0F NEW BoLsTER.

Specification of Letters .Patent Patented Dec. 7, 1915.

Application filed May 19,1914. .Serial No. 839,518.

To all whom t may concern.'

Be it known that I, JOHN F. STREIB, citizen of the United States, residing at No. 739 Taylor avenue, Avalon. in the county o'f Allegheny and State'of Pennsylvania, have invented certain new and useful Improvements in Bolsters, of which the following is a specification.

Until recently the usual maximum load carrying capacity of freight carsin general use has been 100,000 lbs., but with the advent of cars having a load carrying capacity of 140,000 and 160,000 lbs. a necessity has been created for a bolster which is equal to carrying with safety the additional load thereby imposed upon it, and also for a bolster -so designed as to permit of the use of eXtra groups of bolster carrying springs, over and above the four groups which have been in general use hitherto, to carry the increased load.

The greater reliability of a bolster contructed of rolled steel, whether of plates pressed to shape, or built up of rolled sece tions, over one madn of cast steel, is generally recognized, and my invention has for its object the production of a bolster constructed of rolled steel plates, pressed to the desired shape, having a greater strength than the pressed steel bolsters hitherto manufactured, and the obtaining of this extra strength without substantially taking up any more ispace than has been occupied by the lower capacity bolsters hitherto manufactured.

My invention has also for one of its objects the construction of a bolster, which while having no greater width at the portion intermediate its end portians, has end portions of such a width that it will be possible to use in conjunction therewith live or more groups of standard spiral springs, without materially increasing the width of the end portions of tl e `oolsters.

.My invention has for a further object the increasing of the strength of the bolster to resist'vertical and horizontal strains, without materially increasing the depth thereof, all of which objects l attain in the manner described in detail in the description followin i glil/[y invention may be considered as an imv provement upon the bolster' described and claimed in United States Patent No. 574,116, granted to Charles T. Schoen, December 29th, 1896, for bolster for railway cars, andl on line 8-8 of Fig. 5, showing a further modification of my invention.,

Referring in detail to the drawings, 1 indicates the bottom member of the bolster which is substantially trough shaped, having a bottom wall 2, which may be curved or formed as a double'inclined wall. 3 indicates the vertical walls which have a greater depth at their central portions than at their ends, and are provided with substantially horizontal and outwardly projecting flanges 4, 4. T he flanges 4, 4 are shown as being integral with the vertical walls 3, though it is obvious that, if preferred, they may consist` of angles riveted thereto, and perform the same function.

Cooperating with the lower trough shaped member 1, is a superimposed member 5, which may consist of a flat plate secured to the flanges 4, 4, as shown in Figs. 1 to 7 inclusive; or of an inverted trough shaped member 6, which may be made of any` desired depth, having flanges which are complementary and secured to the flanges 4, 4 of the lower member, as shown in F ig. 8. To the end portions of the vertical side walls 3 ofthe lower troughishaped bolster member 1, column guides 8,' 8 are secured, these guides being provided with thev usual projections 9, 9 adapted to engage with the column posts of the truck frame. These column guides extend downwardly from the horizontal flanges 4, 4 of the lower trough shaped member tothe same horizontal plane as the under side of the end portions of the bottom walls 2, and form in efiect lateral eX- tensions of the end portion of the bolster, thus enabling extra, groups of bolster bearing springs 10, 10, to be accommodated underneath the ends of the bolster.

The bolster is equipped with the usual center bearing plate 11, and also with lower side bearings 12. These side bearings may be either solid castings or forgings secured to the bolster by means of countersunk rivets, and are made in the form of an arc of a circle whose radius is struck from the center of the center bearing plate l1.

Figs. 5, (3 and 7 illustrate a modification throughout its length and may be made continuous from end to end of the bolster.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

l. Inv a bolster, the combination with top and bottom members f tving lateral flanges which are riveted together, of column guides forming lateral extensions of the end 'portions of said bolster, said extensions serving as spring seats for said bolster.

2. In a bolster, the combination with ,top and. bottom members having lateral fianges which are riveted together, of column guides secured to the vertical walls of the lower bolster member and forming lateral extensions of the end portions thereof, said extensions serving as spring seats for said bolster.

3. In a. bolster, the combination with top and bottom members having lateral flanges which are riveted together, of a reinforcing member secured to the bottom wall of the f lower of said bottom .bolster members.

4. In a bolster, the combination with top and bottom members having lateral flanges which are riveted together, of a reinforcing member secured to the bottom wall of ythe lower of said bolster members, and column guides secured to the vertical Walls of said lower bolster member and forming lateral extensions of the end portions'thereof.

In a bolster, the combination with a top member of a lower trough shaped member having a reinforcing plate extending from end to end of the bottom wall thereof.

6. A boX-girder-like bolster comprising two rough shaped members having lateral flanges riveted together and column guides secured to the end portions of the lower of said. trough shaped members and forming lateral yextensions thereof.

7.\ In a bolster, the combination with a top member, of a lower trough shaped member, and combined column guides and spring seats secured to said lower member and forming lateral extensions'of said bolster.

l. A bolster comprising a trough shaped member, column guides secured to the end portions of said member and forming lateral extensions thereof, ,and springs adapted to support said bolster, said springs'being arranged beneath said extensions and trough shaped member. 9. In a bolster, the combination with a trough shaped member of a lower trough shaped member and column guides secured to the end portions of said member and forming lateral extensions thereof, said eX- tensions forming spring seats for said bolst In testimony whereof I allix my signature in presence of two witnesses.

,l JOHN F. STREIB. Witnesses:

FRANK E.M1LLBR, M. SUMMERBELT. 

